package com.du.fileload.framework.config;

import com.du.fileload.framework.auth.JwtAuthenticationEntryPoint;
import com.du.fileload.framework.auth.JwtAuthenticationTokenFilter;
import com.du.fileload.framework.auth.RestAuthenticationFailHandler;
import com.du.fileload.framework.auth.RestAuthenticationSuccessHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsUtils;

/**
 * spring security配置
 *
 * @author fx
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

	private static final Logger log = LoggerFactory.getLogger(SecurityConfig.class);

	public static final String AuthTag="Auth";

	@Autowired
	private JwtAuthenticationEntryPoint unauthorizedHandler;

	@Autowired
	@Qualifier("RestAuthenticationAccessDeniedHandler")
	private AccessDeniedHandler accessDeniedHandler;

	@Autowired
	@Qualifier("CustomUserDetailsService")
	private UserDetailsService customUserDetailsService;

	@Autowired
	private JwtAuthenticationTokenFilter authenticationTokenFilter;

	/**
	 * 注入 自定义的  登录成功处理类
	 */
	@Autowired
	private RestAuthenticationSuccessHandler mySuccessHandler;
	@Autowired
	private RestAuthenticationFailHandler myFailHandler;

	/**
	 * 解决 无法直接注入 AuthenticationManager
	 *
	 * @return
	 * @throws Exception
	 */
	@Bean
	@Override
	public AuthenticationManager authenticationManagerBean() throws Exception {
		return super.authenticationManagerBean();
	}


	/**
	 * anyRequest | 匹配所有请求路径 access | SpringEl表达式结果为true时可以访问 anonymous | 匿名可以访问
	 * denyAll | 用户不能访问 fullyAuthenticated | 用户完全认证可以访问（非remember-me下自动登录）
	 * hasAnyAuthority | 如果有参数，参数表示权限，则其中任何一个权限可以访问 hasAnyRole |
	 * 如果有参数，参数表示角色，则其中任何一个角色可以访问 hasAuthority | 如果有参数，参数表示权限，则其权限可以访问
	 * hasIpAddress | 如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问 hasRole |
	 * 如果有参数，参数表示角色，则其角色可以访问 permitAll | 用户可以任意访问 rememberMe |
	 * 允许通过remember-me登录的用户访问 authenticated | 用户登录后可访问
	 */
	@Override
	protected void configure(HttpSecurity httpSecurity) throws Exception {
		// CRSF禁用，因为不使用session
		httpSecurity.csrf().disable().exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and();
		httpSecurity.authorizeRequests()
				//.and()
				//.formLogin()
				// 认证失败处理类
				//.successHandler(mySuccessHandler)
				//.failureHandler(myFailHandler)
				.and()
				// 基于token，所以不需要session
				.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
				// 过滤请求
				.authorizeRequests().requestMatchers(CorsUtils::isPreFlightRequest).permitAll()
				// 对于登录login 验证码captchaImage 允许匿名访问
				.antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
				.antMatchers("/login").permitAll()
				.antMatchers("/common/compress").authenticated()
				.antMatchers("/common/upload").authenticated()
				.antMatchers("/common/**").anonymous()
				.antMatchers("/dresource/**").anonymous()
				// 除上面外的所有请求全部需要鉴权认证
				.anyRequest().authenticated().and().headers().frameOptions().disable();
		httpSecurity.logout().logoutUrl("/logout");
		// 禁用缓存
		httpSecurity.headers().cacheControl();
		// 添加JWT filter
		httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
	}

	/**
	 * 强散列哈希加密实现
	 */
	@Bean
	public BCryptPasswordEncoder bCryptPasswordEncoder() {
		return new BCryptPasswordEncoder();
	}

	/**
	 * 身份认证接口
	 */
	@Override
	protected void configure(AuthenticationManagerBuilder auth) throws Exception {
		auth.userDetailsService(customUserDetailsService).passwordEncoder(bCryptPasswordEncoder());
	}

	@Override
	public void configure(WebSecurity web) throws Exception {
		web.ignoring().antMatchers("/v2/api-docs",
				"/swagger-resources/configuration/ui",
				"/swagger-resources",
				"/swagger-resources/configuration/security",
				"/swagger-ui.html"
		);
	}

}
